Belt for power transmission.



PATENTED MAY 5,1908;

- G. MAGALDI. BELT FOR POWER TRANSMISSION.

APPLICATION FILED JULY 2, 1908..

2 SHEETS-SHEET 1.

Fig.4 f S 'PATENTED MAY 5,1908.

'2 SHEETS-$113312.

.G., MAGALDI. BELT FOR POWER TRANSMISSION.

APPLIOATION FILED JULY 2, 190a.

nu: mmms PETERS co., WASHINGTON, c. c.

GIULIO MAGALDI, OF BUCGINO, NEAR SALERNO, ITALY.

BELT FOR POWER TRANSMISSION.

Specification of Letters Patent.

Patented May 5, 1908.

Application filed July 2, 1906. Serial No. 324,465.

To all whom it may concern:

Be it known that I, GIULIO MAGALDI, a subject of the King of Italy,residing at Buccino, near Salerno, in the Kingdom of Italy, haveinvented new and useful Improvements in Belts for Power Transmission andthe Like, of which the following is a specification.

The present invention refers to such groups of belts, the single partsof which consist preferably of strips of leather, arranged on edge andheld in position by means of metallic holders, the ends of which securethe said strips in such a manner with each other, that the single partssituated between two neighboring metallic holders appear to be bentoutward and form very elastic portions of the belt, between whichportions rigid parts are situated, which are in connection with themetallic holders.

In the drawings,Figure 1 is a plan view of a part of the beltconstructed in accordance with this invention; Fig. 2 represents asimilar view of modified form; Flg. 3 is a similar view artly in sectionof another modification, s owing the connecting means between theseveral groups of leather strips; Fig. 4 is a side elevation with partsin section showing the belt joint; Fig. 5 shows a modified form of thebelt illustrating the great flexibility thereof; Figs. 6 to 13 aredetails of the fastening means for the belt; Figs. 14 and 15 showdetails of a modified form of the connecting means for the belt joint.Fig. 16 is a detail sectional view.

One of the purposes of the present invention is to increase theelasticity. For this purpose the belts can be either entirely or partlymade of strips, arranged in the manner shown in Fig. 1. Here the middlestrips thave an undulating movement, which is produced by the pieces -Zbeing introduced between two neighboring strips, which must inclose saidpieces and are thus bent at c-.

A belt made according to the present invention may consist of a singlestrip, formed according to Fig. 1, or of several such strips connectedin the manner described below, empty spaces being left between thesingle strips across the breadth of the belt.

In many instances it will be advisable to employ an arrangement ofmedium elasticity. For such urposes in the direction of the pull bn thebe t or in any other suitable manner the parts consisting of undulatedstri s c (Fig. 2) are made to alternate Witi strips consisting of smoothstrips e (Fig. 2), empty spaces being left or not between the variousstrips. So a mixed arrangement as shown in Fig. 2 is obtained. It iswell understood that the number and alternations of the undulated partsand the smooth parts is entirely voluntary, which is indicated I in Fig.2 by the projecting ends of the connecting pieces on the right hand ofthe figure in order to show that the belt may be completed by addingfurther parts. The value of this arrangement for belts consists inallowing for the production of a belt by the combination of a number ofindependent parts, and so a belt can always be at hand for heavy duty,while such belts had hereunto always to be made to order. The presentinvention also comprises belts made up of straight strips according toFig. 3, owing to the connecting pieces employed there and furthermentioned below.

The chief purpose of the present invention is to avoid theinconveniences of joining the belts by means of round parts. With theflat shape any section of resistance can be obtained without thethickness of the belt being increased or its strength being reduced.Hardened metal parts can be employed as it is not necessary to rivet theparts or compress them as is necessary in the belt-fasteners used atpresent. The joining of two belts, which may be obtained by means ofordinary clamps s, is facilitated (Figs. 3

and 4) if the belt has empty spaces. The connecting pieces can also bebent between the surfaces of the single strips in such a manner, thatthe edges of the belt can run against projections without the belt orthe surface against which the belt might rub, being damaged. Besides thefiat connecting pieces have the advantage that at a deformation of thebelt, and be it ever so great, (even at an extreme deformation possibleby the elasticity of the belt, see Fig. 5) it can never occur that theconnecting pieces turn themselves, which is frequently the case withsuch pieces when made of round section, and thereby cause wear.

The connection between two parallel strips, leaving an empty spacebetween, is obtained by means of hard metallic plates -f (Fig. 6), whichare inclosed between two flexible bars -g- (Fig. 7 the latter beingforced together by clamps h (Fig. 8), so that these parts form one wholepiece, as may be seen in Fig. 9. The points of bars gare .5 clamps i(Fig. which clamps, as shown in Fig. 11, are forced through the belt andbent over at the ends (see Figs. 1, 3 and 11).

Fig. 12 shows holes z provided in the outside strips of strap -eandintended to receive the heads j of the small clamps i, (Fig. 2) whichare passed through, and

Fig. 13 shows holes lc-, produced by said small clamps 'i in the leatherof the neighboring strip, the one but last. Fig. 16 shows the use of thecombination ;f-, -g and the small clamps i for connecting quite straightstraps together. The longitudinal joint of full belts is obtained bymeans of clamps Z (Fig. 14) which can be pressed together (Fig. 15).These clamps Wil let the parts of the small clamps i folded together assthrough the opening m, whereas t e outward projecting ends -n, nform anopening to receive the one end of a similar clamp symmetrically attachedto the other strip to be joined while the other end of the clamp willrest outside against the second clamp (see Fig. 1). The Whole is thenconnected by a pin passed through hole 0.

It is well understood that the above described devices are only intendedto exem pli'fy the invention, and that such devices maybe varied withoutdeviating from the principle of the invention. By such variation neitherthe longitudinal nor the crosswise flexibility is aifected with relationto the distance of the open connecting pieces.

Having now described my invention what I claim and desire to secure byLetters Patent of the United States is:

1. .A belt of the class described comprising a plurality of longitudinalstrips placed on edge and arranged adjacent to each other said stripsbeing arranged in groups and some of said groups bent in an undulateform, said undulate groups being so placed relatively to each other asto form openings between them, fastening means connecting the adj acentparts of said groups and rigid pieces arranged in said openings andbeing of a thickness to force the strips into a pronounced undulate formca able of increasing the elasticity of the be t.

2. A belt of the class described comprising a plurality of longitudinalstrips placed on edge and .arranged adjacent to each other, said stripsbeing arranged in groups and some of said groups bent in an undulateform, said undulate groupsbeing so placed one with re spect to the otheras to form openings between them, rigid pieces in said openings of atlllCkIlGSS to force the stri s into a pronounced undulate form capab eof increasing the elasticity of the belt, and fastenin means connectingadjacent parts of said groups-one with another and also connecting saidrigid pieces to said groups, said fastening means fastening transverselythrough said strips and said rigid pieces.

3. A belt of the class described comprising a plurality of longitudinalstrips of suitable material placed on edge and arranged adjacent to eachother, some of said strips being bent laterally in reverse directions toform separate openings between them, metallic pieces in said openings,said. bent strips being arranged in groups separated by groupsofstraight strips, both such groups being connected one to another bymeans of metallic pieces, penetrating into the interior of both groups.

4. A belt of the class described comprising a plurality of longitudinalstrips of suitable material placed on edge and arranged adjacent to eachother, some of said strips being bent laterally in reverse directions toform separate openings between them, metallic pieces in said openings,said bent strips being arranged in groups separated by groups ofstraight strips, both groups being connected one to another by means ofmetallic pieces arranged between said groups, said metallic piecespenetrating into the interior of both groups and fixed thereto.

5. A belt of the class described comprising a plurality of grou s oflongitudinal stri s of suitable material p aced on edge, some 0 saidstrips being bent laterally in reverse direc-' tions to form openingsbetween certain of the strips, rigid pieces in said openings betweencertain of the strips, said groups being spaced apart, fastening devicessecuring the strips of the respective groups together, and fasteningdevices also securing the strips together and spanning the space betweenthe groups, both fastening devices passed transversely through saidstrips and rigid pieces.

6. A belt of the class described comprising a plurality of groups oflongitudinal strips, said groups being spaced apart, and fasteningdevices securing strips ofthe several groups together and spanning thespace between the groups, each of said fastening devices comprising aflat plate having pointed ends extending through the stri s, flexiblebars on opposite edges of said p ate also extending through the strips,and clamps connecting the plate and bars together and bearing againstthe innermost strips of the several groups and spacing the groups apart.

7 A belt of the class described comprising a plurality of groups oflongitudinal strips, said groups being spaced apart, and fastenmgdevices securing strips of the several grou s 3 together and spanningthe space between t 1e groups, each of said fastening devices comprisinga flat plate having pointed ends extending through the strips, flexiblebars on 0 openings between them, fastening means connecting said stripstogether, said fastening means being formed of flat bars penetratingsaid strips and fixed therein, and rigid pieces in said openings, saldpieces separating said strips one from another.

9. A belt of the class described comprising a plurality of groups oflongitudinal strips, said groups being spaced apart, and fasteningdevices securing strips of the several groups together and also spanningthe space between the groups, each of said fastening devices comprisinga flat metallic piece pointed at its ends, said piece extending throughthe strips and having its pointed ends bent over.

10. A belt of the class described comprising a plurality of longitudinalstrips, rigid pieces between some of said strips and separating one fromothers, fastening devices extending transversely through said strips andsaid pieces, U-shapedclamps for connecting the ends of the belt, saidclamps engaging certain of said fastening devices, and pins connectingsaid clamps together.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

GIULIO MAGALDI.

Witnesses:

JEAN LELAUNTT, HANSON C. Coxn.

